Leather-trimmer.



PATENTED APR.1'6; 1907.

A. LARSON. LEATHER TRIMMER. APPLICATION FILED MAY 7,1996.

' 11-1: NORRIS PETERS 60.. WASHINGTON, 0 c4 be connected to a stationary supportfor instance, the table supporting the trimmer.

ALFRED LARSON, or ROCKFBRD, ILLINoIs.

LEATHER-TRIMMER.

Ne. s50,591.

Specification of Letters Patent.

Patented April 16, 1907.

Application filed May 7, 1906. Serial No. 315,683.

To (ZZZ whom it may concern:

Be it known that I, ALFRED LARSON, a citizen of the United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Leather-Trimmers, of which the following is a specification.

The object of this invention is to provide a machine for trimming leather in the make-up of a harness, more especially the lines, Winker- I braces, and side rounds. f

In the accompanying drawings, Figure 1 i is a front elevation of my improved leathertrimmer in which a portion is shown in section. Fig. 2 is a vertical lengthwise section on dotted line a a, Fig. 3. Fig. 3 is a plan view. Fig. 4 is an isometrical representation of the knife as seen from its under side. Fig. 5 is an isometrical representation of a section of a winker-brace before being i trimmed. Fig. 6 is an isometrical representation of a section of winker-brace after being trimmed.

The base 1 can be secured to a table or other support by screws entering the holes 2. This base is formed with a series of projections 3, 4, 5, 6, 7, and 8, extending from its upper face. These projections are of four different heights and widths and are flat on their upper surface. I

From the upper surface of the base project 1 two rods 9. A clamping-plate 10 is formed on its under face with siX vertically-extending recesses 11, 12, 13, 14, 15, and 16, within the lower open ends of which are located the projections 3, 4, 5, 6, 7, and 8. The upper ends of these recesses are semicircular in form. From the-lower edge of this clamping-plate extends a bar 17, to the lower end of which is connected a coiled spring 18. The other end of this spring is intended to The rods 9 pass through vertical openings in the clamping-plate and serve as guides for the plate in its vertical movement.

From the under face of the base depends a projection 19, to which are pivoted the links I 20, one one either side. A lever 21 has a j pivotal connection with the links about midway of its length. One end of this lever 21 has a pivotal connection with the lower end of the bar 17. The other end of this lever has a rod 22 attached to it, by means of which the lever can be rocked to raise the clamping-plate into the position shown in dotted lines at Fig. 2. The base supports three screws 23, one located centrally of the 7 length of the base and one at either end. These screws have a reduced screw-threaded portion 24, and a plate or washer 25 is supported by the shoulder formed by the different-sized threaded portions of the screws.

A knife 26 is formed with six concave cutting edges 27, 28, 29, 30, 31, and 32 and located opposite the six recesses 33, 34, 35, 36, 37, and 38. This knife is formed with three vertical openings 39, through whicht he three screws 23 pass, and nuts are placed on the projecting ends of the screws which clamp the knife against the washers 25.

The leather to be trimmed is in the form shown at Fig. 5 and comprises a center layer 41 and an outside layer 42 embracing the center layer, and the layers held together by stitching. The leather in this form has one rounded edge and one flat edge. The clamping-plate is raised, and a leather is placed in one of the concave recesses forming a cutting edge. The plate is then lowered, which will locate the fiat edge of the leather against the flat 1131381 surface of one of the projections exten ing from the upper surface of the base. The leather is then drawn in the direction indicated by the arrow at Fig. 3, which will bring the corners of its flat edge against the cutting edge of one of the cutters, thereby removing sufficient leather that it will assume the form shown at Fig. 6. The recesses 15 and 16 are designec'l to receive the two leathers of a winker-brace, and the two recesses 11 and 12 are also for winker-braces, but of a smaller diameter. The two recesses 13 and 14 are for different-sized lines or various round trimmings. By means of the screws 23 the knife can be adjusted bodily so as to remove more or less of the leather.

I claim as my invention 1. A leather-trimmer comprising a base, a knife with a series of concave cutting edges supported by the base, a clamping plate located adjacent to the cutting edges and provided with a series of recesses, one for each cutting edge, the clamping-plate having a bodily movement toward and from the knife, and means for raising the plate.

2. A leather-trimmer comprising a base, a knife with a series of concave cutting edges supported by the base, a clamping-plate located adjacent to the cutting edges and provided with a series of recesses of varying sizes, one for each cutting edge, the clamp- IIO ing-plate having a bodily movement toward sizes, one for each cutting edge, the clamping- IO and from the knife, means for raising the plate having a bodily movement toward and plate, and yielding means for holding it from the knife, means for raising the plate, down. and means for adjusting the knife bodily 3. A leather-trimmer comprising a base, a i toward and from the clamping-plate.

i knife With a series of concave cutting edges ALFRED LARSON.

supported by the base, a clamping-plate, Witnesses: located adjacent to the cutting edges and l A. O. BEHEL, provided with a series of recesses of varying E. BEHEL. 

